Technical trasnsmission problem

[drhoward20]

71 fiat shifts slow 1 and 2 to 3
once warm only gears are 3 and 4
only way to use reverse is to start in reverse once out cant go back what is cause
fluid or linkage or transmission

 

[djape1977]

whatr model of '71 fiat are you talking about?
auto box or manual?